Vol. 87 No: 3

Title:
Determination of S-RNase genotypes and isolation of four novel S-RNase genes in Japanese apricot (Prunus mume Sieb. et Zucc.) native to China

Authors:
P.P. WANG, T. SHI, W.B. ZHUANG, Z. ZHANG and Z.H. GAO

pp: 266-270

Abstract:
Japanese apricot (Prunus mume Sieb. et Zucc.) originated in China with more than 500 cultivars. Most cultivars are self-incompatible. It is essential to identify S-genotypes for production and breeding. The S-genotypes of 17 Japanese apricot cultivars native to China were determined using the Prunus S-RNase consensus primer pair, Pru-C2 and PCE-R, which were designed from the second and third conserved regions of Prunus S-RNases, respectively. Eleven S-RNase alleles (S₁ S₂, S₇, S₁₂, S₁₄, S₁₅, S₁₈, S₂₀, S₂₂, S₂₃ and S₂₆) and four new S-RNase alleles (S₃₀, S₃₁, S₃₂ and S₃₃) with GenBank Accession Numbers JN232975, JN232976, JN232977, JN232978 were identified. Furthermore, the S-genotypes of four Japanese apricot cultivars were confirmed by field-testing for cross-pollination. The results of this study enrich the information available on S-genotypes in Japanese apricot and provide a reasonable basis for the appropriate arrangement of pollination trees in orchard practice.

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